DE2403295C2 - Device for preheating powdery or granular thermoplastics - Google Patents

Device for preheating powdery or granular thermoplastics

Info

Publication number
DE2403295C2
DE2403295C2 DE2403295A DE2403295A DE2403295C2 DE 2403295 C2 DE2403295 C2 DE 2403295C2 DE 2403295 A DE2403295 A DE 2403295A DE 2403295 A DE2403295 A DE 2403295A DE 2403295 C2 DE2403295 C2 DE 2403295C2
Authority
DE
Germany
Prior art keywords
fan
extruder
heat exchanger
storage container
granular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE2403295A
Other languages
German (de)
Other versions
DE2403295A1 (en
Inventor
Erich 2841 Steinfeld Riedel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NORDENIA-KUNSTSTOFFE PETER MAGER KG 2841 STEINFELD DE
Original Assignee
NORDENIA-KUNSTSTOFFE PETER MAGER KG 2841 STEINFELD DE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AT601973A external-priority patent/AT344399B/en
Application filed by NORDENIA-KUNSTSTOFFE PETER MAGER KG 2841 STEINFELD DE filed Critical NORDENIA-KUNSTSTOFFE PETER MAGER KG 2841 STEINFELD DE
Publication of DE2403295A1 publication Critical patent/DE2403295A1/en
Application granted granted Critical
Publication of DE2403295C2 publication Critical patent/DE2403295C2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/021—Heat treatment of powders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/793—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling upstream of the plasticising zone, e.g. heating in the hopper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Description

Die Erfindung bezieht sich, wie auch das Patent 22 35 023 auf eine Vorrichtung zum Vorwärmen jo pulverförmiger oder körniger thermoplastischer Kunststoffe mit einem an einen Extruder anschließbaren Vorratsbehälter der mit einer Leitung zum Zuführen eines erwärmten LuftstroTis ven hen istThe invention relates, like the patent 22 35 023 to a device for preheating jo powdery or granular thermoplastics with one that can be connected to an extruder Storage container which is ven with a line for supplying a heated air flow

Eine derartige Vorrichtung ist aus der DE-AS 14 54 806 bekannt Sie weist einet; Vorratsbehälter auf, dem ein Vorwärmgerät zugeordnet ist Dieses Vorwärmgerät ist mit elektrischen Heizkörpern und mit einem Gebläseaggregat ausgerüstet über das ein heißer Luftstrom in den Vorratsbehälter eingeführt wird.Such a device is known from DE-AS 14 54 806. It has one; Storage container on, to which a preheater is assigned This preheater is with electric radiators and with equipped with a blower unit through which a stream of hot air is introduced into the storage container.

Wie dem Patent 22 35 023 liegt auch der Erfindung die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art so zu gestalten, daß ein zusätzlicher Energiebedarf für das Aufheizen bzw. Vorwärmen der pulverförmigen oder körnigen thermoplastischen Kunststoffe im Vorratsbehälter des Extruders entfällt.Like the patent 22 35 023, the invention is based on the object of providing a device of the initially named type so that an additional energy requirement for heating or preheating the There is no need for powder or granular thermoplastics in the storage container of the extruder.

Diese Aufgabe wird nach der Erfindung alternativ zu den beiden im Hauptpatent angegebenen Lösungen dadurch gelöst, daß der beim Betrieb Verlustwärme abgebende Teil des Extruders ein von einem Temperiermedium durchflossenes Rohrschlangensystem aufweist, das mit Rohrschlangen eines vom Luftstrom eines Ventilators durchströmten Wärmeaustauschers verbunden ist, der an die in den Vorratsbehälter führende Leitung angeschlossen ist.According to the invention, this object is an alternative to the two solutions given in the main patent solved in that the part of the extruder which gives off heat loss during operation is supplied with a temperature control medium has flowed-through coiled pipe system, which with coiled pipes one of the air flow of a Fan flowed through heat exchanger is connected to the leading into the storage tank Line is connected.

Durch den Gegenstand der Erfindung werden die Energiekosten für den Betrieb der Extruderanlage herabgesetztThe subject matter of the invention reduces the energy costs for operating the extruder system degraded

Die im Betrieb des Extruders und seiner Profilwerkzeuge entstehende Verlustwärme wärmt nicht nur durch die Rückführung in den Vorratsbehälter die körnigen oder pulverförmigen Kunststoffe vor, sondern es wird auch die Verlustwärme von dem Betriebsraum ferngehalten. The heat lost during the operation of the extruder and its profile tools not only warms through the return to the storage container the granular or powdered plastics before, instead it becomes also kept the heat loss away from the operating room.

Bei einer vorteilhaften Ausführungsform ehr Erfindung wird zwischen dem Wärmeaustauscher und dem Ventilator eine Kaltluftzuführung vorgesehen.In an advantageous embodiment or the invention a cold air supply is provided between the heat exchanger and the fan.

Hierdurch ist es möglich, dem Vorratsbehälter ständig Luft einer bestimmten Temperatur zuzuführen, so daß ein gleichmäßiges Vorwärmen der pulverförmigen oder kömigen, thermoplastischen Kunststoffe im Vorratsbehälter gewährleistet istThis makes it possible to constantly supply air at a certain temperature to the storage container, so that a uniform preheating of the powdery or granular, thermoplastic plastics in the Reservoir is guaranteed

Die Erfindung wird durch ein Ausführungsbeispiel im folgenden an Hand der Zeichnung erläutertThe invention is explained below by means of an exemplary embodiment with reference to the drawing

Ein Extruder 1 weist eine Schnecke 2 aut, die zum Plastifizieren des Kunststoffmaterials 3 dient und der Heizelemente 4 zugeordnet sind. Nach dem Plastifizieren des aus einem Vorratsbehälter 5 der Schnecke 2 zugeführten Kunststoffmaterials wird dieses mittels der Schnecke durch einen Formkopf 6 gepreßt aus dem das thermoplastische Produkt 7, z. B. eine Kunststoffolie, austritt. Die Schnecke 2 wird von einem Rohrschlangensystem 8 umgeben, das einen ZulaufstuLzen 9 besitzt und von einem Temperiermedium, z. B. Wasser, durchflossen wird. Das Temperiermedium wird durch die Verlustwärme des Extruders aufgeheizt und über eine Leitung 10 den Rohrschlangen 11 eines Wärmeaustauschers 12 zugeführt Nach dem Durchströmen der Rohrschlangen U fließt das Temperiermedium an der Ausflußstelle 13 ab.An extruder 1 has a screw 2 aut which is used to plasticize the plastic material 3 and the Heating elements 4 are assigned. After the plasticizing of the screw 2 from a storage container 5 supplied plastic material this is pressed by means of the screw through a molding head 6 from which the thermoplastic product 7, e.g. B. a plastic film, exit. The screw 2 is surrounded by a pipe coil system 8 which has an inlet nozzle 9 and of a temperature control medium, e.g. B. water, is flowed through. The temperature control medium is controlled by the Heat loss from the extruder and heated via a line 10 to the coils 11 of a heat exchanger 12 supplied After flowing through the coils U, the temperature control medium flows to the Outflow point 13 from.

Der Wärmeaustauscher 12 ist so gebaut, daß ein Ventilator 14 die Luft 15 über Rohrführungen 16,17 und ein Drosselsystem 18 ansaugt Die Luft 15 erwärmt sich im Wärmeaustauscher und wird über eine Leitung 19 dem Vorratsbehälter 5 zugeführt Beim Durchströmen des Vorratsbehälters gibt die Luft üire Wärme an das Kunststoffmaterial 3 ab. Die abgekühlte Luft entweicht anschließend über einen Rohrstutzen 20. Damit ein stabiler Regelkreis gegeben ist kann über ein Rohr 21 Kaltluft angesaugt werden, deren Anteil mit der erwärmten Luft 15 durch eine entsprechende Einstellung der Drossel 18 bestimmt wird. Die so gemischte Luft gewährleistet den stabilen Regelkreis.The heat exchanger 12 is built so that a fan 14, the air 15 via pipe guides 16,17 and a throttle system 18 sucks in the air 15 is heated in the heat exchanger and is via a line 19 supplied to the storage container 5 As it flows through the storage container, the air gives off heat to the Plastic material 3 from. The cooled air then escapes through a pipe socket 20 A stable control loop is given, cold air can be sucked in via a pipe 21, the proportion of which with the heated air 15 is determined by a corresponding setting of the throttle 18. The so mixed one Air ensures the stable control loop.

Zur Verfeinerung der Regelung kann es von Vortei' sein, auch das zurückgeführte Luftvolumen zu steuern. Aus diesem Grunde ist es zweckmäßig, dem Ventilator einen drehzahlgeregelten Antrieb zuzuordnen. Der Antrieb des Venlilators kann über einen Gleichstrommotor oder über einen polumschaltbaren Drehstrommotor erfolgen.To refine the regulation, it can be advantageous to also control the returned air volume. For this reason, it is advisable to assign a speed-controlled drive to the fan. Of the The fan can be driven by a direct current motor or via a pole-changing three-phase motor.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (3)

Patentansprüche:Patent claims: 1. Vorrichtung zum Vorwärmen pulverförmiger oder körniger thermoplastischer Kunststoffe mit einem an einen Extruder anschließbaren Vorratsbehälter, der mit einer Leitung zum Zuführen eines erwärmten Luftstroms versehen ist, nach Patent 2235023, dadurch gekennzeichnet, daß der beim Betrieb Verlustwärme abgebende Teil des Extruders (1) ein von einem Temperiermedium durchflossenes Rohrschlangensystem (8) aufweist, das mit Rohrschlangen (11) eines vom Luftstrom eines Ventilators (14) durchströmten Wärmeaustauschers (12) verbunden ist, der an die in den Vorratsbehälter (5) führende Leitung (19) angeschlossen ist1. Device for preheating powdered or granular thermoplastics with a storage container which can be connected to an extruder and which is equipped with a line for supplying a heated air flow is provided, according to patent 2235023, characterized in that the part of the extruder (1) that emits heat loss during operation is supplied with a temperature control medium has a flow-through pipe coil system (8), which with pipe coils (11) one of the air flow a fan (14) flowed through heat exchanger (12) is connected to the in the Reservoir (5) leading line (19) is connected 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zwischen dem Wärmeaustauscher (12) und dem Ventilator (14) eine Kaltluftzuführung (18, 21) vorgesehen ist2. Device according to claim 1, characterized in that that between the heat exchanger (12) and the fan (14) a cold air supply (18, 21) is provided 3. Vonieötung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dem Ventilator (14) ein drehzahlgeregelter Antrieb zugeordnet ist.3. Vonieötung according to claim 1 or 2, characterized characterized in that the fan (14) is assigned a speed-controlled drive. 2525th
DE2403295A 1973-07-09 1974-01-24 Device for preheating powdery or granular thermoplastics Expired DE2403295C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT601973A AT344399B (en) 1972-07-17 1973-07-09 DEVICE FOR HEATING THE RAW MATERIAL IN THE RESERVOIR OF AN EXTRUDER

Publications (2)

Publication Number Publication Date
DE2403295A1 DE2403295A1 (en) 1975-01-23
DE2403295C2 true DE2403295C2 (en) 1983-01-20

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ID=3582045

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2403295A Expired DE2403295C2 (en) 1973-07-09 1974-01-24 Device for preheating powdery or granular thermoplastics

Country Status (1)

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DE (1) DE2403295C2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4337205C2 (en) * 1993-10-30 1996-02-08 R & T Umwelt Gmbh Process for heat recovery from extrusion and granulating devices of plastic recycling plants and device for carrying out the process
DE10013948A1 (en) * 2000-03-21 2001-09-27 Basell Polyolefine Gmbh Granulation of thermoplastic polymers, especially polyolefins, comprises preheating polymer powder and feeding it at high temperature to extruder where it is melted, homogenised and compressed and then cooled and comminuted
DE102008023046A1 (en) 2008-05-09 2009-11-12 Coperion Gmbh Plastic granulating plant has granulating device that is water-cooled with granulated-water, where bulk-cargo heat exchanger is provided with heat exchanger medium for heating plastic-bulk cargo
DE102013202997A1 (en) * 2013-02-24 2014-08-28 Battenfeld-Cincinnati Germany Gmbh Method for using the amount of heat released in an extrusion process
DE102013202996A1 (en) * 2013-02-24 2014-08-28 Battenfeld-Cincinnati Germany Gmbh Method for using the amount of heat released in an extrusion process
US9776354B2 (en) 2013-02-24 2017-10-03 American Maplan Corporation Extrusion process

Also Published As

Publication number Publication date
DE2403295A1 (en) 1975-01-23

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